Engine.



N. TIBBEYTS.

ENGzNE.

0 APPLICATION msn MAY4,1914. y A 3.3725329, Patemd; my 9,1m@

' 2 SHEETS-'SHEET 2.

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v #ei/ f 33 TJILTON TBBETTS, F DETROIT, MICHIGAN, ASSGNOR T0 PACKLRD MOTOR CAEQGSM FANY, DETROXT, MICHGAN, A OBPSRTIN OF MICHGAN.

ENGINE.

Specification of Letters Patent.

rammen sing e, isis.

Original application tiled March 18, 1.909', Serial eo. 484,231. Divided and this application led may e, 18M.

, Serial No. $36,284.

To all whom 'it may concern:

Be it. known that I, Mrn'ron Tinnr'rs, a citizen of the United States, and resident of Detroit, lVayne county, State of Michigan. have invented certain new and useful Improvements in Engines, ot' which the following is a specification.

rThis application a division of co-pending application Seriai' No. 484,231, filed March 18, 1909, and relates to engines in the broadest sense, including motors of all kinds, con'ipressors and blowing` engines., pumps and similar devices and particularly to internal combustion moto employing sliding valves.

Engines have heretofore heen constructed in which the inlet and outlet ports are arranged opposite cach other and in approximately the same plaire and in which a pair of sleeves surround the piston and have cooperating ports to open and close the cylinder ports, and it is improvements upon and additions to such motors that. constitute the subject matter of my present invention.

l@ne of the objects of my invention is to provide a valve mechanism 'that is simple in construction and positive in operation.

.Another object of my invention is to obtain a larger, quicker, and more positive openingl and closing of the inlet and exhaust ports oi the cngineithan has heretofore been accomplished. i

These and other objects will appear in the following description taken in connection with the drawings, in which Figure 1 is a transverse sectional View throughthe center of the cylinder of an engine embodying sonic of the feat-uros of my invention g Fig. 2 is .a section on the iine 22 of Fig. l;

Fig'. 3 is a transverse sectionai view, simi lar to iFig. 1, of an engine embodying another torni of my invention; and

Fig. 4 is a section on the line 4 4 of Fig. 3.

in one forni of the invention shown in the uncover tno niiet, and outlet port.

and the other of which is adapted to control one only of said ports.

Referring to the drawings 2O represents the casing or cylinder of the engine having double walls forming a water jacket T his casing is mounted on the upper or supporting section 22 of the crank case and the crank shaft 23 is-mounted in hearings 24: between said section and the removable in terniediate section 25. The bottom of the crank case is closed hy the removable cover 26 which forms an oil well into which the cranks QT dipn as they rovoivc, thus iuhrieating, by the spiash system. the various working` parts Within the crank case.

, Also mounted to rotate in the supporting section 22 parallel with the crank shatty is a valve operating shaft, 28 having eccentrics or cranks Q9 for reciprocating the valves hereinafter described. This shafty 28 driven by the crank shait by two-to-one lgearing such as illustrated in the drawing and hereinafter described whereby the motor is operated on the four stroke cycle.

rithe upper end. of the casing or cylinder is closed by a removable end wall or head 30, the cylindrical shaped central partv 3l ot' -which extends down into the casing,r as shown, leaving an annuiar space 32 between its pe iphery and the inner wall or" the casinfr. This head is also water jacketed as shown, its water jacket being connected with the jacket 2i of the cylinder, and 1t is vtorined with horizontai ports 33, -':hich nearly divide it, the lower part 34 being suspended only hy the hollow arms 35 through which the water passes to the jacket 36. The said iower part 34 is in the form of a hollow ring with the ports 33 along its upper edge and thus these ports are constant communication with the interior oi the casing or cylinder 20. A spark plug' 37 is provided in the contrai part of the head for igniting the charge .in the cylinder. as is Well understood.

The casini or cylinder Q0 is `formed With inlet. and exhaustV chambers and 3), which extend parallel with each other ventirely around the casing's. being"v separated hy a thin partition 40. The inlet chamher 38 communicates with the inlet pipe el and with the ports 42 in the casing wail, which ports are arranged approixinateiy in a plane with the ports in the d,

60 trolling the lower or exhaust ports, the inarrangement of scribed, and the exliaust chamber 39 communicates with the exhaust pipe 43 and with the ports lll in the casing wall, which ports 4st extend practically around the cylinder and are arranged just below the lower edge of the part 34 of the head above described.

It will be understood that with the above chambers and ports the total area of the ports will be greater than in engines employing opposite inlet and outlet `ports where each port extends less than L 'half way around the cylinder, and when the engine isl used as an explosive motor the vhot exhaust gases passing through the exhaust chamber, will tend to warm the gases entering the inlet chamber.

-Referring particularly to Figs. 1 and 2, it will be seen that guided by the inner wall ofthe casing and arranged co-axially and end to end are two sleeves, the upper sleeve 10'0 moving up and down in the annular space 32 between the head 30 and the inner wall of the casing to close the inlet port 42 and the lower sleeve 101 surrounding the piston and moving down and up towopen and close the exhaust is reciprocated by rods 102 which are connected to ears 103` on the sleeve, and extend down through vertical guidways 104 into thecrank case where their lower ends are connected by rods 105 with cranks or eccentrics 29 on the valve operating shafts. The lower sleeve is connected through ears 106 and rods 107 with its respective cranks or eccentrics on the shafts, as will be clearly seen. In this form of the invention I have showntwo operating'shafts, one on each side of the motor, and they are identical in construction and are rotated by two-to pne-gearing from the crank shaft, such as large gears 108 and small gear 109. The use of -two operating shafts guards against twistin or binding of the sleeves that might occur i? only one shaft were used.

.ie-Referring to Figs. 3 and fl, it will be seen that guided by the inner Wall of the easingI 20 and extending into the annular space 32, is a sliding valve shown' in the form of a cylindrical sleeve 50a, having two sets of ports 51 and 52, each of which sets extends entirely around the sleeve, the sections above and below the ports being connected by webs. The ports 51 are adapted to register with the inlet ports 42 and conse uently with the port 33 in the head 3 0 adil the ports 52- are adapted to register Withthe exhaust port 44.

. Surrounding-l the sleeve 50i is an outer sleeve'53a which is shorter than the inner sleeve and coperates therewith only in conner sleeve alonecontrolling the inlet ports. Except as stated and as to a slight dilerence in the timing of the sleeves made necessary by their construction, this motor is port 441. The upper sleeve similar to the other form and like parts are similarly designated. v

The periphery of the central `part of the head is provided with split packing rings above and below the ports whereby the ports are made tight when said ports are over these rings which is preferably during the compression and ring` strokes of the motor.

It is evident that the ports and passages may be formed in the cylinder and sleeves in various ways and the invention is not limited to the specilic forms shown.

Having thus described my invention, what lI claim and desire to secure by Let'- ters Patent is 1. The combination with a casing having aA head extending into one end thereof and a working piston in the casing, of a single sleeve valve between the extended part of the head and the surrounding casing, and another sleeve valve between the piston and the casing, and means for operating said valves. l

2. The combination with a casing having a head extending into one end thereof and a working piston in the casing, of a single sleeve valve between the extended part of the head and the surrounding casing, and another sleeve valve between the piston and the rising, and positive means for operating said valves.

3. The combination with a casing having aworking piston therein and formed with inlet and outlet ports arranged axially beyond one end of the path of travel of the piston and an annular unobstructed valve chamber coaxial with the piston, of a plurality of open ended sleeve valves relatively movable and arranged end to end in said chamber for controlling said ports, and means for actuating the said Valves.

4.. rlhe conibination with a cylinder having a working piston therein and formed with inlet and exhaust'ports at one end thereof, of a pair of sleeve valves concentric with the cylinderaxis, one sleeve controlling the inlet and the other the exhaust port, and means for actuating said sleeves includin a connection to one sleeve at the head en of the cylinder and a connection to the other sleeve at the opposite end of the cylinder.

5. The combination with a cylinder having a fixed cylinder head and a Working piston therein, said cylinder formed with inlet and outlet ports at one end thereof, of a pair of sleeve valves concentric with the cylinder axis for controlling said ports, and means for actuating said sleeve including a connection to one sleeve at the head end of the cylinder and a connection to the other sleeve at the opposite end of the cylinder.

6. The combination with a crank case and a cylinder carried thereby having a 

